OF PHILADELPHIA. 295 



APHODIUS Illig. Fabr. 



A. VITTATU8. — Black ; clypeus trituberculate ; elytra with :i 

 dull rufous vltta. 



S<(ir(thpeas rittatus Melsh. Catal. 



Head minutely punctured ; three tubercles placed in a trans- 

 verse line, the intermediate one largest, and the lateral ones elon- 

 'Sdted in a line to the eye : tip of the clypeus slightly and very 

 obtusely eniarginated : thorax with numerous small punctures: 

 elytra with narrow punctured strias ; the interstitial spaces flat ; 

 a dull rufous vitta including the humerus at base, [192] extend- 

 ing somewhat oblicjuely towards the apex of the elytron, and con- 

 tracted in the middle : feet obscure rufous. 



Length more than three-tweutieths of an inch. 



This insect is very like the f<'rmiu<th'.< nobis, but it may be dis- 

 tinguished by the vitta of the elytra, and the much less pru- 

 t'uuudly cmarginated clypeus. 



TROX Fabr. 



1. T. STRIATULUS. — Elytra with elevated acute lines, and in- 

 termediate regular grooves. 



Trox stn'dtufus Melsh. Catal. 



Head blackish-brown, with confluent punctures ; tip widely 

 emarginate : thorax blackish-brown, with dilated confluent punc- 

 tures ; a slightly impressed longitudinal groove ; sides very much 

 decurved : elytra light brown, with numerous profound grooves, 

 which are separated b}- elevated acute lines. 



Length three-twentieths of an inch. 



The smallest species known to inhabit the United States, and 

 <o perfectly distinct in the striking character of its grooved ely- 

 tra, as not to reciuire any comparative observations. 



2. T. TERRKSTRis. — Elytra with raised obtuse lines, on which 

 are round fascicles of short hairs. 



Trox terrextn's Melsh. Catal. 



Body blackish-brown : head with two small tubercles on the 

 front : thorax with the dorsal groove very distinct, contracted 

 and almost obliterated in its middle, so as to be nearly inter- 

 rupted into two, on each [193] side of the posterior portion of 

 1825.] 



